Roster Help: Executor or Jedi Knight Luke?

Hey guys. I recently finished unlocking General Skywalker and now I'm shifting focus to either unlocking JKL or the Executor. I'm inclined to pursue the ship to be honest, but my roster is still pretty soft for high end TB play. Can I get some opinions on the next move? I'm torn. Part of me thinks I should focus on TB development, because I'm not even sure my roster would be considered "late/end game" yet.

Roster: https://swgoh.gg/p/679964672/